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Appalachian Mountains - Wikipedia
Geology of the Southern Appalachian Mountains
Appalachian Mountains | Definition, Map, Location, Trail, & Facts ...
Appalachia - Wikipedia
Appalachian Mountains - Geology, Plateau, Valleys | Britannica
Geology of the Appalachians - Wikipedia
Birth of the Mountains The Geologic Story of the Southern Appalachian ...
The Southern Appalachians: Teacher's Guide - USGS Publications …
Mammals - Blue Ridge Parkway (U.S. National Park Service)